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AD1852 3.3V I2C

Question asked by GTV31 on May 15, 2016
Latest reply on Jun 6, 2016 by DaveThib

Hello guys,

So I have the following situation:

- I am using a Bluetooth module that output I2C justified data (48kHz sampling rate and a variable bit rate {between 16-24-32 bits} depends on played format) to the AD1852. The I2C lines are pulled high by 4.7k pullups at a 3.3V and when data is transferred from the module to the DAC (I have checked it with a logic analyser) the audio output is filled with noise ( something like pink noise).

Can this be caused by the fact that the I2C line is pulled at 3.3V and not at 5V (i tried with a logic level shifter and there is no audio coming out at all, I think I even burned the DAC)? If this is not the problem, can someone suggest me what it could be and how to solve it. 

Thank you for the attention.

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